I have picked up copies periodically over the last few years and finally subscribed this year (print edition). I like it, there's a diverse set of articles centered around a common subject matter. It's easy to read a few articles at a time (I usually read it linearly, but that's just my habit for reading in general, you could easily bounce around). I don't think I've read every article in any issue I've picked up, but I have found a lot of interesting things. Even if it's just giving me a more global perspective or different historical perspective, being a more diverse set of authors than I have encountered in my usual reading which tends to be: contemporary news and analysis, science fiction, technical (usually software related, but often math as well).
If you're just curious about it, just go to your local bookshop or order an issue online and check it out. They're not cheap, but I think the list price is under $20 for an issue (around 200 pages of text and images).